21129009

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{3701}}^1$

素因数の和:3888

約数の個数: 16

約数和(自身を含む): 30919104

約数和(自身を除く): 9790095

約数列:

[1, 3, 11, 33, 173, 519, 1903, 3701, 5709, 11103, 40711, 122133, 640273, 1920819, 7043003, 21129009]

約数ペア:

[(1, 21129009), (3, 7043003), (11, 1920819), (33, 640273), (173, 122133), (519, 40711), (1903, 11103), (3701, 5709)]